Refrigerating apparatus.



MONARY P. ADAMS.

PPPRIGBRATING APPARATUS. `-APLIOATION FILED DEO. 5. 1911.

Patented Aug. 12, 1913.

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Application ed December 5, 1911. Serial No. 664,102.

To all whom t may concern.'

Be it known that I, MCNARY FQ ADAMS, a citizen of the United States,residing at Denrer, in the county of Denver and State of Colorado,haveinvented certain new and useful improvements in RefrigeratingApparatus, ot which the following is a specification, reference beinghad to the accompanying drawings.

This invention is an improved automatically operating refrigeratingsystem for use on railway cars and also foruse in connection with acommon house refrigerator, a cold storage room, or any other form ofrefrigerator or cooling chamber, the object of the invention being toprovide a compact refrigerating apparatus which may be contained in acomparatively small chamber, admitting of its use on railway cars and inotherplaces zonvhere space is limited, and which,V when once started inoperation, continues to oper# ate indefinitely and'is automaticallycontrolled so as to adapt itself to variations of temperature in therefrigerating chamber and hence dispense with the services of anattendant.

rlhr invention consists in the construction, combination and arrangementof de'- vices hereinafter described and claimed.

ln the accompanying drawings: Figure 1 is a sectional view of arefrigerating car provided with my improved automatically operatingrefrigerating system, the storage'v battery and the condenser beingindicated in section; Fig. 2 is a vertical sectional vie-w.

of the same on the plane indicated by the line. aa of Fig. 1; and, -Fig. 3- is a similar view of the same on the plane indicated by' the lineb-b of Fig. 1. r

F or the purposes of this specification my improved automaticallyoperating refrigerating lsystem is shown installed in a refrigerator'car 1, which comprises a refrigerating chamber2 and a chamber 3 in whichthe operating parts of the refrigerating system are installed, the said"chambers-being separated by a partition'wall 4 and the chamber 3 beingof small capacity as compared with the refrigerating chamber 2,"therefrigerating apparatus, in accordance with j ,my invention, beingcompactly disposed and taking up only a lsmall portion of the space inthe car.

The usual vexpansion or evaporating pipes 5 are shown in the upperportion of the rerigerating chamber 2, anl auxiliary amand preferablynear the adjacent end of the car. The lower'end of the condensing coilis connected to the receiver' 9 as `at 13, and the pipe 14 leads to theupper end of the said condensing coil -from4 va compressor pump of thecommon rotary type, indicated at 15, the said pipe 14 being,r providedwith av check valve, which is indicated at 16. A pipe 17 discharges-intothe 4compressor' from the auxiliary receiver 6.

The operation of 'the refrigerating apparatus per se .will be readilyunderstood by those skilled in the art to which my invention relates andneed not be described. All these parts of the apparatus are located inthe chamber 3. Also arranged in the said chamber is an electric motor 18and a I storage battery 19. The driving pulley of the electric motor isconnected to that of the compressor pump by means of an endless belt 20.An electric generator 21 is also provided, which is arranged under thebottom of the rcar and'is suitably connected to one of the car aXles tobe driven thereby. The generator is connected in electric cir d cuitwith the vstorage battery and also withl the electric motor by means ofsuitable conductors indicated at 2 2. Below the car is an air pipe 23which is connected byva branch 24 to the bottom of the tank 12 of thecondenser coil and this branch pipe includes a valve 25. Air is forcedby this means to the bottom of the tank 12 and passes up through thewater therein for the purpose of reducing its temperature, as will beunderstood. I also arrange in the refrigerating chamber a thermostat v26which is hereindicated as a bar secured at one end on a suitable bracketor support 27 x and comprises members of different metals havingdifferent co-eficients of' expanslon so that the free, upper end of thethermostatic bar is adapted to move to a consideri able extent under`variations of temperature in the refrigerating chamber. Ialso ,arrange,in the chamber 3, anelectrlc switch 28, the terminals of which areincluded in the motor circuit. The movable element of this switch, whichis here shown as a knife .29, is operated 'by-a rod 30 which ispivotally -connected to its upper end, as at 31. A rod 32 is directlypivotally connected to the upper end of the thermostatic bar as at 33and is also pivotally connected to the rod as at 34. IVhen thetemperature in the refrigerating chamber is as vlow as is desired theswitch is kept open by the thermostat and hence' the motor and thecompressor will remain inoperative. When, however, the temperature risesin the refrigerating chamber the thermostat acts to ciose the switch andthereby start the motor andV hence the refrigerating apparatus inoperation. l v

It will be understood from the lforegoing that the operation of theapparatus is entirely automatic and that it does not require theservices of an attendant.

When my automatically operating refrigerating system is in use on a caras here shown I also Aprovide the car with elecytric connections 35whereby the motor may.

be supplied with4 current from any source of electric power, when thecar is at a sta- /tion' or is held on a side track.' Wit-hin the scopeof my invention, also, the generator may be driven byother means than bybeing connected to one of the car axles.

Having thus described my invention I claim: j

TheI combination with a refrigerating car,

lofvrefrigerating apparatus including a fiat `ammonia supply reservoirext-ending longitudinally of and underneath said cooling tank, a coolingcoil comprising superposed tlat convolutions disposed in said tank, apipe connection from said reservoir opening through the bot-tom of saidtank and connectedto said coil, an auxiliary ammo.- nia reservoirdisposed near the top of the car, a U-shaped pipe disposed verticallybetween said auxiliary reservoir and said tank with the lowest point ofthe bight disposed near the car Hoor, one leg of said pipe beingconnected to said auxiliary reservoir, and the other leg having ahorizont-al extension entering the open top of said tank and con- .a

nected to said coil, a compressor communieating with the bight of saidpipe, an evaporating pipe extending from said auxiliary reservoir anddisposed horizontally above said auxiliary reservoir, a reduced pipeconnection between said evaporating pipe and said supply reservoir, andmeans for actuating said compressor.

IRENE E. YOUNG, R. R. RoLLINs.

In testimony whereof I hereunto aiix my

